36 



Plate III. 



Fig. 1. Dissection of the arterial system from the dorsal 

 side. The main arterial trunks are drawn 

 somewhat larger than they are naturally. For 

 the sake of clearness, details of the anatomy 

 have been omitted. {ah. art.) abdominal 

 artery; (rev. (j.) cerebral gangdion ; (cr.arf.) 

 crural arteiy; (cji.ai-t.) epinun-al arteries; 

 [gen. art.) g-cnital artery; (hep. art.) hepatic 

 arteries; (///.) heart; (int. art.) intestinal 

 artery; (/at. art.) lateral artery; (med.ao.) 

 median aorta; (op. a.) ophthalmic artery; 

 i^ost.) ostium; (vent, art.) ventral artery; (i-vii) 

 thoracic arteries. 



Fig. 2. Arteries of the left side of ventral surface of 

 head and first thoracic segments, [ant. art.) 

 antennal artery; (fae. art.) facial artery; 

 (^mand. art.) mandibular artery; (inx.) artery 

 of first maxilla; (in.v''.) arterj' of second 

 maxilla ; [tn.vp.) artery of m.axillipede ; (^oes. 

 art.) oesophageal artery. Other references as 

 in the preceding hgure. 



Fig. o. Afferent vessels of the superior lamella of one 

 of the abdominal a[)pendages injected with 

 indigo-carmine from the sternal sinus. 



Fig. 4. The nervous system, seen from above after the 

 removal of the muscles and viscera, (ah. (/.) 

 abdominal ganglion; (ant. n.) antennaiy 

 nerve; (f/.n-) nerve to stomach; (med.n.) 

 median nerve; (^m.p.n.) nerves of mouth 

 appendages; (op. I.) optic lobes; [snh-oos. g.) 

 sub-oesophageal ganglion; (Tli'.g.) tirst 

 thoracic a'anpdion. 



